Customs is the part of importing that intimidates people most — and it’s the part that, handled correctly, is the most routine. Here’s a plain-language walkthrough of what happens to your shipment at the border and what you can do to keep it moving.

How a shipment clears customs

When your goods reach the destination country, the carrier submits a customs declaration describing them: what they are, how many, what they cost, where they came from. A customs officer reviews the declaration against the country’s rules and decides whether duties and taxes apply.

Three things can happen:

1. Clearance — the declaration is accepted and your goods are released. This is the outcome for the large majority of properly declared commercial shipments.
2. Examination — the declaration is flagged for inspection. Goods may be X-rayed or physically opened. This happens randomly and when something in the declaration looks off.
3. Delay or hold — the declaration has a problem: missing documentation, an implausible valuation, or a regulated product without the right certifications.

Duties and taxes, briefly

Most countries charge:

• Customs duty — a percentage of the goods’ customs value, which varies by product classification.
• Value-added tax (VAT) or sales tax — charged on the value of the goods plus duty and freight.
• Excise or special taxes — on specific categories like alcohol, tobacco, or certain electronics.

Your products are classified under HS codes — the harmonized system used worldwide. The code determines your duty rate, so getting it right matters. A miscoded product can mean paying too much duty, or worse, underpaying and getting a correction notice later.

The four most common reasons shipments get held

1. Undervaluation. Declaring a value far below reality to reduce duty is the fastest way to get your goods examined — and to build a bad reputation with the customs authority that follows your importer record.
2. Missing or mismatched paperwork. The commercial invoice, packing list, and declaration must agree. A quantity on the invoice that doesn’t match the packing list is a classic hold trigger.
3. Incorrect HS codes. Especially common with new products where the classification isn’t obvious.
4. Regulated goods without certifications. Electronics, toys, cosmetics, and food contact materials often need compliance marks (CE, FCC, FDA registration, and so on) before they can enter.

What you can do before you ship

• Keep documentation complete and consistent. Your supplier’s commercial invoice should list products, quantities, and values exactly as packed.
• Confirm HS codes before the goods leave China. It’s far easier to correct a code in advance than to argue about it at the border.
• Check compliance requirements for your product category. If your product needs a certification, budget for it before your first order, not after the shipment is on the water.
• Work with a partner who clears shipments every day. A good freight forwarder or repackaging company handles the declaration correctly the first time — and knows how to resolve examinations quickly when they happen.

The reassuring part

Customs isn’t a lottery. The overwhelming majority of commercial shipments clear without drama because they’re declared properly. The shipments that get held are almost always the ones where a detail was ignored. Pay attention to the details — or work with someone who does — and customs becomes the most boring step in your supply chain, which is exactly what you want it to be.